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Abstract

A process for the manufacture of ferric sulphate from ferrous sulphate in a closed circuit or vessel comprising a liquid phase and a vapor phase, wherein the vapor phase is essentially a closed system, the process comprising the oxidation between about 70.degree. C. to about 150.degree. C. of Fe.sup.++ .fwdarw.Fe.sup.+++ under pressure utilizing commercial oxygen in the closed circuit or vessel using (NO.sub.x) as a catalyst where x is a number between 1 and 2 inclusive of 1 and 2, and wherein the process comprises the following reactions: 1) NO+1/2O.sub.2 .fwdarw.NO.sub.2, and 2) 2FeSO.sub.4 +H.sub.2 SO.sub.4 +NO.sub.2 .fwdarw.Fe.sub.2 (SO.sub.4).sub.3 +H.sub.2 O+NO, and wherein the oxidation of Fe.sup.++ is affected by spraying the reacting solution containing Fe.sup.++ introduced to the closed circuit or vessel through a reacting cloud in the vapor phase comprising NO, NO.sub.2 and O.sub.2 enclosed in the vapor phase of the closed circuit or vessel and wherein substantially only Fe.sub.2 (SO.sub.4).sub.3 is present in the liquid phase of the closed circuit or vessel prior to the addition of FeSO.sub.4 through the reacting cloud in the vapor phase.

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First Claim